The Elite (120/250 GB HDD, HDMI, black) shares failure points with all 360s. Diagnose systematically:
$SystemUpdate from Xbox site → FAT32 USB → root → boot.If reflow/reball needed (BGA solder fracture under GPU/CPU) — not worth it. Buy Xbox Series S ($300) — plays 360 games via BC, better in every way. Or used 360 S/E ($60–100) if you need disc drive.